Process for treating a sodium carbonate purge
US-12434976-B1 · Oct 7, 2025 · US
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Purification
Purification · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C01D3/14 |
| Official title | Purification |
| Display label | Purification |
| Total patents | 24 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 1 |
| 2017 | 5 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for purifying brine generated in aromatic compound producing process
US-2024124328-A1 · Apr 18, 2024 · US
Salt production via hydrohalite decomposition
US-11932551-B2 · Mar 19, 2024 · US
Brine purification process
US-11802060-B2 · Oct 31, 2023 · US
Process for producing a concentrated aqueous sodium hydroxide solution
US-11465907-B2 · Oct 11, 2022 · US
Engineering process for halogen salts, using two identical electrodes
US-2022186392-A1 · Jun 16, 2022 · US
Process for conditioning and reusing salt-containing process water
US-2022145006-A1 · May 12, 2022 · US
Method of purifying sodium bromide from waste circuit boards pyrolysis coke
US-2021309533-A1 · Oct 7, 2021 · US
Brine purification process
US-2021163317-A1 · Jun 3, 2021 · US
Brine purification process
US-11014832-B2 · May 25, 2021 · US
Salt production via hydrohalite decomposition
US-2021122643-A1 · Apr 29, 2021 · US
Process for treating a sodium carbonate purge
US-2021070620-A1 · Mar 11, 2021 · US
Method and apparatus for treatment of effluents from production plants of epoxy compounds
US-10883184-B2 · Jan 5, 2021 · US
Brine purification process
US-2017313600-A1 · Nov 2, 2017 · US
Process for treating a sodium carbonate purge
US-2017183237-A1 · Jun 29, 2017 · US
Process and apparatus for purification of industrial brine
US-9605350-B2 · Mar 28, 2017 · US
Process for treating a sodium carbonate purge
US-9593023-B2 · Mar 14, 2017 · US
Process for the purification of a residue
US-9555343-B2 · Jan 31, 2017 · US
Brine mining process
US-2016272513-A1 · Sep 22, 2016 · US
Production of high purity salt with reduced levels of impurities
US-9090478-B2 · Jul 28, 2015 · US